A5 Magnum. Sure, no problem. Gonna cost ya, though. Got chocolate?
Normal configuration: 1, 4, 2, 5, 3.
For 2-3/4" shells: 1 , 4, and 2 go between the spring and receiver, 3, 5 on the far end. If you are still having trouble cycling, put 3 with the taper against the spring and 5 on top of it. Just FYI, many A5 Magnums had trouble cycling 2-3/4" shells with any configuration, so if it still has trouble cycling reliably, put 3 under the spring as well.